Abstract
The authors studied the geometry of the facies articularis superior tibiae. The results of this study allowed to establish a relationship between the geometric features of these articular surfaces and rotation of the knee. The medial glenoid surface of the tibia can be likened to the base of an inclined ellipsoid while the lateral glenoid surface resembles part of an inclined elliptic torus. In the course of axial rotation of the knee, the medial intercondylar tubercle acts as a swivel whereas the lateral intercondylar tubercle is submitted to a movement of sliding. The data presented are based on the measurement of these articular surfaces in 30 anatomical specimens.
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